Higgs and BSM Physics at the Future Muon Collider

Franceschini, Roberto; Greco, Mario

doi:10.3390/sym13050851

Cited by 41 publications

(24 citation statements)

References 76 publications

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“…As for the studies in muon colliders, these corrections have been mentioned in studies related to Higgs boson line-shape and design of machine. For example, the impact of this modification factor on Higgs boson production rate is expected to be of the order of 50% [67]. As seen in Eq.20, this reduction factor depends on the center-of-mass energy so that the higher √ s the larger suppression rate.…”

Section: Prospects For a Multi-tev Muon Collidermentioning

confidence: 99%

Unitarity Constraints and Collider Searches for Dark Photons

Hosseini,

Najafabadi

2022

Preprint

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Dark photons are predicted by various new physics models, and are being intensively studied in a variety of experiments. In the first part of this paper, we obtain partial wave unitarity constraints on the dark photon parameter space from the allowed V V → V V scattering processes in the limit of large center-of-mass energy, where V = W, Z. In the second part of the paper, searches are performed using the expected differential rates with a realistic detector simulation including a comprehensive set of background processes on dilepton and dilepton plus a photon events at the High Luminosity LHC. In these searches, sensitive differential distributions are used in an optimized way to determine the sensitivity to dark photon parameter space. It is shown that remarkable sensitivity to the dark photon model is achieved and kinetic mixing strength can be probed down to (1 − 4) × 10 −4 for dark photon mass between 15 GeV to 2 TeV. We also investigate the sensitivity of a future muon collider suggested by the Muon Accelerator Program (MAP) to the dark photon model at different center-of-mass energies. It is shown that a future muon collider is able to reach a sensitivity to kinetic mixing at the order of 10 −4 .

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Section: Prospects For a Multi-tev Muon Collidermentioning

confidence: 99%

Unitarity Constraints and Collider Searches for Dark Photons

Hosseini,

Najafabadi

2022

Preprint

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“…Muon colliders have recently attracted considerable interest as successor machines to the LHC [55][56][57][58][59][60][61][62][63][64]. Representative muon colliders concepts at the energy frontier may feature multi-TeV scale center-of-mass energies and luminosities of order ∼ ab −1 .…”

Section: Future Muon Collidersmentioning

confidence: 99%

Systematically Testing Singlet Models for $(g-2)_μ$

Capdevilla,

Curtin,

Kahn

et al. 2021

Preprint

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We comprehensively study all viable new-physics scenarios that resolve the muon (g − 2) µ anomaly with only Standard Model singlet particles coupled to muons. Since such models are only viable in the MeV -TeV mass range and require sizable muon couplings, they predict abundant accelerator production through the same interaction that resolves the anomaly. We find that a combination of fixed-target (NA64µ, M 3 ), B-factory (BABAR, Belle II), and collider (LHC, muon collider) searches can cover nearly all viable singlets scenarios, independently of their decay modes. In particular, future muon collider searches offer the only certain test of singlets above the GeV scale, covering all higher masses up to the TeV-scale unitarity limit for these models. Intriguingly, we find that O(100 GeV) muon colliders may yield better coverage for GeV-scale singlets compared to TeV-scale concepts, which has important implications for the starting center-of-mass energy of a staged muon collider program.

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“…They already cover quite a few interesting aspects, such as measuring various Higgs properties [50][51][52][53][54][55], probing dark matter models [56][57][58], investigating models motivated by flavor physics [59][60][61][62] or the g µ − 2 anomaly [63][64][65][66][67][68][69][70], higher-dimensional operator analyses [71][72][73][74], and other BSM studies [75][76][77][78][79][80][81][82][83]. General prospects of muon collider phenomenology can be found in [84][85][86]. However, the panorama of future muon collider phenomenology remains to be fully explored.…”

Section: Introductionmentioning

confidence: 99%

Electroweak ALP Searches at a Muon Collider

Bao¹,

Fan²,

Li³

2022

Preprint

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A high-energy muon collider with center-of-mass energy around and above 10 TeV is also a vector boson fusion (VBF) machine, due to the significant virtual electroweak (EW) gauge boson content of high-energy muon beams. This feature, together with the clean environment, makes it an ideal collider to search for TeV-scale axion-like particles (ALP) coupling to Standard Model EW gauge bosons, which current and other future colliders have limited sensitivities to. We present detailed analyses of heavy ALP searches in both the VBF and associated production channels at a muon collider with different running benchmarks. We also show projected constraints on the ALP couplings in the effective field theory, including an operator with its coefficient not determined by the mixed Peccei-Quinn anomaly. We demonstrate that a muon collider could probe new ALP parameter space and push the sensitivities of the couplings between the ALP and EW gauge bosons by one order of magnitude compared to HL-LHC. The projected limits and search strategies for ALPs could also be applied to other types of resonances coupling to EW gauge bosons.

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Higgs and BSM Physics at the Future Muon Collider

Cited by 41 publications

References 76 publications

Unitarity Constraints and Collider Searches for Dark Photons

Unitarity Constraints and Collider Searches for Dark Photons

Systematically Testing Singlet Models for $(g-2)_μ$

Electroweak ALP Searches at a Muon Collider

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